A few months ago, I switched from eSignal to Ensign, with IB as the data feed. I'm generally pleased, although admittedly there have been a few IB data issues recently. (One of the reasons I switched from eSignal is because the data almost always lagged during heavy trading, such as immediately following an FOMC announcement.) Here is my issue. I notice that when I do a manual refresh on Ensign (say, ALT+1), the OHLC of a few of the price bars occasionally change from what they were before the refresh. More often than not this change is innocuous. However, from time to time, I have found that what was previously a setup is no longer a setup for me because of the change in the configuration of the price bars. And vice versa. This feels a bit like driving on ice. I trade ES almost exclusively using 1-minute charts. As an aside, in Ensign's Data tab of the Chart Properties window, the "auto refresh" box is checked. I spoke with Ensign's technical support, and they point the finger at IB. I spoke with IB, however, they have not offered any solutions. Have any of you folks experienced this issue and, if so, how do you deal with it?